I need help deciding between the jlr red dot and a os tz 5 port. If pipes, fuel, and setup etc....are all equal, how do these engines stack up against each other on acceleration and top speed. I can get either of these brand new for 170, just having trouble deciding which. I know the tz 5 port is outlaw, but the only track I run club races at allows anything that is .12. There are a few tz 3 and 5 ports at my track, along with some sirio's and novarossi. I would like to be the only one with the jlr red-dot at my track. What do you all think?